JPH0447936Y2 - - Google Patents
Info
- Publication number
- JPH0447936Y2 JPH0447936Y2 JP1984112672U JP11267284U JPH0447936Y2 JP H0447936 Y2 JPH0447936 Y2 JP H0447936Y2 JP 1984112672 U JP1984112672 U JP 1984112672U JP 11267284 U JP11267284 U JP 11267284U JP H0447936 Y2 JPH0447936 Y2 JP H0447936Y2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- mold layer
- layer
- resin
- elasticity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004804 winding Methods 0.000 claims description 34
- 238000009413 insulation Methods 0.000 claims description 19
- 229920003002 synthetic resin Polymers 0.000 claims description 12
- 239000000057 synthetic resin Substances 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 47
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 239000003822 epoxy resin Substances 0.000 description 8
- 229920000647 polyepoxide Polymers 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 229920005749 polyurethane resin Polymers 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000005041 Mylar™ Substances 0.000 description 1
- -1 and for example Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Insulating Of Coils (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
この考案は、変成器、リアクトル等の巻線を有
する電気機器に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to electrical equipment having windings such as transformers and reactors.
［従来技術およびその問題点］
変成器、リアクトル等の巻線を有する電気機
器において、鉄心に巻線を巻き、鉄心および巻線
のまわりに巻線の絶縁や巻線鉄心への湿気の遮断
を目的に合成樹脂でモールドした外装のモールド
層を形成することが一般に行われる。[Prior art and its problems] In electrical equipment with windings, such as transformers and reactors, the windings are wound around an iron core, and the windings are insulated around the iron core and the windings, and moisture is blocked from entering the winding core. For this purpose, it is generally done to form an exterior mold layer molded with synthetic resin.
外装モールド層用の合成樹脂は一般的にエポキ
シ樹脂が用いられる。このエポキシ樹脂は硬化反
応過程で水分子を出さず電気的絶縁性が高く而も
機械的強度が大きい、と云う優れた性質を有する
が、エポキシ樹脂は、反応硬化型の合成樹脂一般
について云えることであるが、反応硬化過程にお
いて硬化収縮し、この硬化収縮力が鉄心に磁気歪
みを発生させ、特性不良になることがある。 Epoxy resin is generally used as the synthetic resin for the exterior mold layer. This epoxy resin has excellent properties such as not emitting water molecules during the curing reaction process, high electrical insulation, and high mechanical strength. However, curing shrinkage occurs during the reaction curing process, and this curing shrinkage force may generate magnetic distortion in the iron core, resulting in poor characteristics.
そこで、従来は、第１図に示すように、鉄心１
と巻線との間に鉄心の全周面を覆うように複合材
でなる絶縁防護層２を形成するようにしている。
この絶縁防護層２は、鉄心１側から順に、ゴム、
コルク、スポンジ等のクツシヨン材３、絶縁材
４、マイラーテープ（「マイラー」は商標）、絶縁
プレスボード、絶縁テープ等の絶縁材５、絶縁テ
ープ６を積層した複合材であり、このような絶縁
防護層２のまわりに巻線が施されてエポキシ樹脂
の外装モールド層が形成されている。 Therefore, conventionally, as shown in Fig. 1, the iron core 1
An insulating protection layer 2 made of a composite material is formed between the iron core and the winding so as to cover the entire circumferential surface of the iron core.
This insulation protection layer 2 consists of rubber, rubber,
It is a composite material in which a cushioning material 3 such as cork or sponge, an insulating material 4, an insulating material 5 such as Mylar tape ("Mylar" is a trademark), an insulating press board, an insulating tape, and an insulating tape 6 are laminated. A winding is applied around the protective layer 2 to form an outer mold layer of epoxy resin.
しかしながら、上記の絶縁防護層２はクツシヨ
ン材３による弾力性と絶縁材４，５による絶縁性
の付与を期待するものであるが、外装のモールド
層を形成する際のモールド樹脂（エポキシ樹脂）
液が絶縁材４，５の間隙に完全に浸入せずこのた
め空気がボイドが屡発生しコロナ放電開始始電圧
を低下させたり、またモールド樹脂（エポキシ樹
脂）液がクツシヨン材３の隙間部に浸入してクツ
シヨン材３が高弾性のモールド樹脂（エポキシ樹
脂）で固められて弾力性を損し、これが鉄心の磁
気的特性不良の原因となり品質上のバラツキが生
じ易いと云う問題点がある。 However, although the above-mentioned insulation protection layer 2 is expected to have elasticity due to the cushion material 3 and insulation properties due to the insulating materials 4 and 5, the mold resin (epoxy resin) used to form the exterior mold layer is
The liquid does not completely penetrate into the gap between the insulating materials 4 and 5, and as a result, air voids are often generated, lowering the starting voltage of corona discharge, and the molding resin (epoxy resin) liquid may enter the gap between the cushion material 3. There is a problem in that the cushioning material 3 is hardened by a highly elastic molding resin (epoxy resin) and loses its elasticity, which causes poor magnetic properties of the core and tends to cause variations in quality.
また上記の絶縁防護層２は数種の材料を巻回し
ながら組み合わせて形成する複合材であるから製
作に時間がかかると云う問題点もある。 Furthermore, since the above-mentioned insulating protective layer 2 is a composite material formed by combining several kinds of materials while winding them, there is also the problem that it takes time to manufacture.
［問題点を解決するための手段］
この考案は、上記問題点を解決するために、環
状鉄心の表面に絶縁防護層を形成し、その絶縁防
護層上に巻線を巻き、上記の鉄心、絶縁防護層及
び巻線を合成樹脂でモールドして外装モールド層
を形成してなる巻線を有する電気機器において、
上記の絶縁防護層を弾力性と絶縁性のある合成樹
脂でモールドして内装モールド層に形成し、環状
鉄心と巻線及び外装モールド層を接着一体化させ
るようにしたのである。[Means for solving the problem] In order to solve the above problem, this invention forms an insulation protection layer on the surface of the annular core, winds a winding wire on the insulation protection layer, In electrical equipment having a winding formed by molding the insulation protection layer and the winding with synthetic resin to form an exterior mold layer,
The above-mentioned insulating protection layer is molded with a synthetic resin having elasticity and insulating properties to form an interior mold layer, and the annular core, winding wire, and exterior mold layer are bonded and integrated.
上記内装モールド層に適した合成樹脂は外装用
のモールド樹脂の高弾性に較べて弾力性（低弾性
かつ高伸縮性）に優れ且つ絶縁性に優れたもので
あり、例えばポリウレタン樹脂を適したものとし
て掲げることができる。 The synthetic resin suitable for the above-mentioned interior mold layer is one that has superior elasticity (low elasticity and high elasticity) and insulation properties compared to the high elasticity of the exterior mold resin, and for example, polyurethane resin is suitable. It can be listed as
［作用］
従来の絶縁防護層２に替えて、弾力性と絶縁性
のある合成樹脂でモールドした内装モールド層に
成形することにより、この内装モールド層に従来
の絶縁防護層２に生じていたような隙間の発生が
なくなり、従つて外装のモールド層を形成する際
のモールド樹脂液の浸入がないので、内装モール
ド層の弾力性を損することがなくなり一定に維持
できる。[Function] By replacing the conventional insulation protection layer 2 with an interior mold layer molded with a synthetic resin having elasticity and insulating properties, this interior mold layer has the same properties as the conventional insulation protection layer 2. Since there are no gaps, and therefore no mold resin liquid enters when forming the exterior mold layer, the elasticity of the interior mold layer is not impaired and can be maintained at a constant level.
内装モールド層を弾力性と絶縁性のある合成樹
脂により接着一体形成するので、環状鉄心と内装
モールド層の界面におけるボイドが皆無になつて
コロナ放電開始電圧の低下を防止でき、また内装
モールド層の絶縁性により環状鉄心と巻線との間
の絶縁耐力が確保できると共に、更に内装モール
ド層の弾力性により環状鉄心に作用していた外
力、即ち巻線の際の締付力、外装モールドの際の
熱硬化性樹脂の硬化収縮力、或いは種々の原因で
外装モールド層に加わる外側からの力、等の外力
が弾性エネルギーとして蓄えられて緩和され、環
状鉄心への力の伝達がやわらげられて磁気的歪み
の防止を計ることができる。 Since the interior mold layer is integrally bonded and formed using a synthetic resin with elasticity and insulating properties, there is no void at the interface between the annular core and the interior mold layer, which prevents a drop in the corona discharge starting voltage. The insulation property ensures the dielectric strength between the annular core and the winding, and the elasticity of the inner mold layer also reduces the external forces acting on the annular core, such as the tightening force during winding and the external force during external molding. External forces such as the curing shrinkage force of the thermosetting resin or external forces applied to the exterior mold layer due to various reasons are stored as elastic energy and relaxed, softening the transmission of force to the annular core and causing magnetic It is possible to prevent target distortion.
巻線のまわりに外装モールド層を形成すること
により、巻線および内装モールド層と接着一体化
でき、巻線の絶縁向上を計ることができる。 By forming an outer mold layer around the winding wire, the winding wire and the inner mold layer can be integrally bonded and the insulation of the winding wire can be improved.
［実施例］
第２図、第３図、第４図、第５図は順に本願考
案の実施例を製作する過程の説明図である。[Embodiment] FIGS. 2, 3, 4, and 5 are explanatory diagrams of the process of manufacturing an embodiment of the invention in this order.
第２図の切り欠き断面図に示すように、環状鉄
心１の底面、内周面および外周面を囲む壁面を有
する型７を準備して、その型７内に適宜なスペー
サ８を介して環状鉄心１を挿入したのち、弾力性
と絶縁性を有する合成樹脂、例えばポリウレタン
樹脂の樹脂液を注入する。注入したポリウレタン
樹脂液を反応硬化させると、第３図の切り欠き断
面図に示すようにポリウレタン樹脂９の内装モー
ルド層１０を形成できる。第４図は、このように
して得られた内層モールド層１０のまわりに巻線
１１を巻回することを示した斜視図である。第５
図は、巻線１１のまわりに常法どおりエポキシ樹
脂をモールドして外装モールド層１３を形成した
立体断面図を示している。 As shown in the cutaway cross-sectional view of FIG. After the iron core 1 is inserted, a synthetic resin having elasticity and insulation properties, such as a resin liquid of polyurethane resin, is injected. When the injected polyurethane resin liquid is reacted and cured, an interior mold layer 10 of polyurethane resin 9 can be formed as shown in the cutaway cross-sectional view of FIG. FIG. 4 is a perspective view showing winding of the winding 11 around the inner mold layer 10 obtained in this manner. Fifth
The figure shows a three-dimensional cross-sectional view in which an exterior mold layer 13 is formed by molding epoxy resin around the winding 11 in a conventional manner.
ポリウレタン樹脂９製の内装モールド層１０の
中に外装モールド用のエポキシ樹脂１２の浸入は
皆無であつた。このような巻線を計器用変流器に
構成し、その変流比誤差を測定すると＋0.5〜＋
0.8の範囲に収まつた。第１図に示す従来例の構
成では変流比誤差が−1.8〜＋0.8の範囲にあり、
本願考案の巻線を有する電気機器は環状鉄心１の
磁気特性の劣化、磁気特性のバラツキ共に少ない
ことが解る。更にまた、外装モールド層１３に機
械的衝撃を加えた場合の環状鉄心１の磁気特性の
劣化もなくなつた。 There was no infiltration of the epoxy resin 12 for the exterior mold into the interior mold layer 10 made of polyurethane resin 9. When such a winding is configured into an instrument current transformer and the current transformation ratio error is measured, it is +0.5 to +
It fell within the range of 0.8. In the conventional configuration shown in Figure 1, the current transformation ratio error is in the range of -1.8 to +0.8.
It can be seen that the electrical equipment having the winding of the present invention has less deterioration in the magnetic properties of the annular core 1 and less variation in the magnetic properties. Furthermore, the magnetic properties of the annular core 1 no longer deteriorate when mechanical shock is applied to the outer mold layer 13.
［考案の効果］
以上のように、この考案は環状鉄心と巻線との
間の環状鉄心表面に弾力性と絶縁性のある合成樹
脂で内装モールド層を接着一体化して設けるの
で、コロナ放電開始電圧が高くなり、この内装モ
ールド層の絶縁性により環状鉄心と巻線との間の
絶縁耐力が確保できると共に、この内装モールド
層の弾力性により、環状鉄心に作用する外力、即
ち巻線の際の締付力、外装モールド樹脂の硬化収
縮力、或いは種々の原因で外装モールド層に外側
から加わる力、等の外力が緩和され、環状鉄心の
磁気的歪みを防止できる効果がある。[Effects of the invention] As described above, this invention provides an inner mold layer made of elastic and insulating synthetic resin and is integrally bonded to the surface of the annular core between the annular core and the winding, which prevents corona discharge from starting. As the voltage increases, the insulating properties of this inner mold layer ensure the dielectric strength between the annular core and the winding, and the elasticity of this inner mold layer reduces the external force acting on the annular core, that is, during winding. External forces such as the tightening force of the external mold, the hardening contraction force of the exterior mold resin, or the force applied from the outside to the exterior mold layer due to various causes are alleviated, and magnetic distortion of the annular core can be prevented.
絶縁防護層として、弾力性と絶縁性のある合成
樹脂の内装モールド層を採用することにより、従
来の絶縁防護層に生じていたような隙間が皆無状
態となりコロナ放電開始電圧の低下を防止できる
効果がある。 By adopting an interior molded layer of elastic and insulating synthetic resin as the insulation protection layer, there are no gaps that occur in conventional insulation protection layers, and a drop in the corona discharge starting voltage can be prevented. There is.
絶縁防護層として、弾力性と絶縁性のある合成
樹脂の内装モールド層を採用することにより、外
装モールド層を形成する際のそのモールド樹脂液
が内装モールド層に浸入し得ないので、内装モー
ルド層の弾力性を損することがなくなり一定に維
持でき、品質が安定する効果がある。 By adopting an interior mold layer made of elastic and insulating synthetic resin as the insulation protection layer, the mold resin liquid used to form the exterior mold layer cannot penetrate into the interior mold layer. It is possible to maintain a constant elasticity without losing its elasticity, which has the effect of stabilizing quality.
外装モールド層を巻線および内装モールド層と
接着一体化することにより、絶縁の向上や大気中
の湿気の遮断を計ることができる効果がある。 By adhering and integrating the outer mold layer with the windings and the inner mold layer, it is possible to improve insulation and block atmospheric moisture.
第１図は従来例を説明する断面図、第２図〜第
５図は実施例の製作過程における図面で、第２
図、第３図は切り欠き断面図、第４図は斜視図、
第５図は立体断面図、である。
１……環状鉄心、７……型、９……ポリウレタ
ン樹脂、１０……内装モールド層、１１……巻
線、１３……外装モールド層。
Fig. 1 is a cross-sectional view for explaining the conventional example, Figs. 2 to 5 are drawings of the manufacturing process of the embodiment;
Figure 3 is a cutaway sectional view, Figure 4 is a perspective view,
FIG. 5 is a three-dimensional sectional view. DESCRIPTION OF SYMBOLS 1... Annular iron core, 7... Mold, 9... Polyurethane resin, 10... Inner mold layer, 11... Winding wire, 13... Exterior mold layer.
Claims (1)
縁防護層上に巻線を巻き、上記の鉄心、絶縁防護
層及び巻線を合成樹脂でモールドして外装モール
ド層を形成してなる巻線を有する電気機器におい
て、上記の絶縁防護層を弾力性と絶縁性のある合
成樹脂でモールドして内装モールド層に形成し、
環状鉄心、巻線および外装モールド層を接着一体
化させたことを特徴とする巻線を有する電気機
器。 A winding formed by forming an insulation protection layer on the surface of a circular iron core, winding a winding wire on the insulation protection layer, and molding the above iron core, insulation protection layer, and winding wire with synthetic resin to form an exterior mold layer. In electrical equipment having a
An electrical device having a winding characterized in that an annular core, a winding, and an exterior mold layer are bonded and integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11267284U JPS6127320U (en) | 1984-07-23 | 1984-07-23 | Iron core for winding of electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11267284U JPS6127320U (en) | 1984-07-23 | 1984-07-23 | Iron core for winding of electrical equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6127320U JPS6127320U (en) | 1986-02-18 |
| JPH0447936Y2 true JPH0447936Y2 (en) | 1992-11-12 |
Family
ID=30671711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11267284U Granted JPS6127320U (en) | 1984-07-23 | 1984-07-23 | Iron core for winding of electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6127320U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0534348Y2 (en) * | 1987-10-30 | 1993-08-31 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5419927B2 (en) * | 1971-10-18 | 1979-07-19 | ||
| JPS57186306A (en) * | 1981-05-11 | 1982-11-16 | Hitachi Ltd | Magnetic core and manufacture thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5419927U (en) * | 1977-07-12 | 1979-02-08 | ||
| JPS5983014U (en) * | 1982-11-27 | 1984-06-05 | 松下電工株式会社 | core |
-
1984
- 1984-07-23 JP JP11267284U patent/JPS6127320U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5419927B2 (en) * | 1971-10-18 | 1979-07-19 | ||
| JPS57186306A (en) * | 1981-05-11 | 1982-11-16 | Hitachi Ltd | Magnetic core and manufacture thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6127320U (en) | 1986-02-18 |
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